Hammer drill



FIG. 1 is a front left perspective view of the hammer drill;

FIG. 2 is a left elevational view thereof;

FIG. 3 is a right elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the drawings represent portions of the hammer drill that form no part of the claimed design. 

The ornamental design for the hammer drill, as shown and described. 